* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            color: #1a202c;
            overflow: hidden;
        }

        .app-container {
            display: grid;
            grid-template-columns: 320px 1fr 350px;
            grid-template-rows: 80px 1fr;
            height: 100vh;
            max-width: 1800px;
            margin: 0 auto;
            gap: 15px;
            padding: 15px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            box-shadow: 0 25px 50px rgba(0,0,0,0.15);
            overflow: hidden;
        }

        .header {
            grid-column: 1 / -1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
            color: white;
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(66, 153, 225, 0.3);
        }

        .header h1 {
            font-size: 2em;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .header .status-indicator {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #48bb78;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.7; transform: scale(1.1); }
        }

        .controls-panel {
            background: white;
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            overflow-y: auto;
            height: calc(100vh - 110px);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .controls-panel::-webkit-scrollbar {
            width: 6px;
        }

        .controls-panel::-webkit-scrollbar-track {
            background: #f1f5f9;
            border-radius: 3px;
        }

        .controls-panel::-webkit-scrollbar-thumb {
            background: #4299e1;
            border-radius: 3px;
        }

        .experiment-area {
            display: flex;
            flex-direction: column;
            gap: 15px;
            overflow: hidden;
            position: relative;
        }

        .info-btn {
            position: absolute;
            top: 15px;
            right: 15px;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: none;
            background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
            color: white;
            font-size: 18px;
            font-weight: bold;
            cursor: pointer;
            z-index: 10;
            box-shadow: 0 4px 15px rgba(66, 153, 225, 0.3);
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .info-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 6px 20px rgba(66, 153, 225, 0.5);
        }

        .info-btn:active {
            transform: scale(0.95);
        }

        .observations-panel {
            background: white;
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            overflow-y: auto;
            height: calc(100vh - 110px);
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .observations-panel::-webkit-scrollbar {
            width: 6px;
        }

        .observations-panel::-webkit-scrollbar-track {
            background: #f1f5f9;
            border-radius: 3px;
        }

        .observations-panel::-webkit-scrollbar-thumb {
            background: #4299e1;
            border-radius: 3px;
        }

        .scenario-section {
            background: white;
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }

        .scenario-section h3 {
            color: #2d3748;
            margin-bottom: 15px;
            font-size: 1.1em;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .scenario-section h3::before {
            content: '🔧';
            font-size: 1.2em;
        }

        .scenario-select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 14px;
            background: white;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .scenario-select:focus {
            outline: none;
            border-color: #4299e1;
            box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
        }

        .parameter-group {
            margin-bottom: 0;
            padding: 15px;
            background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
            border-radius: 10px;
            border: 1px solid #e2e8f0;
        }

        .parameter-group h4 {
            color: #2d3748;
            margin-bottom: 12px;
            font-size: 0.95em;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .parameter-group h4::before {
            content: '⚙️';
            font-size: 1em;
        }

        .parameter-row {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
            gap: 8px;
        }

        .parameter-row label {
            flex: 1;
            font-size: 12px;
            color: #4a5568;
            font-weight: 500;
        }

        .parameter-row input {
            width: 60px;
            padding: 6px 8px;
            border: 2px solid #e2e8f0;
            border-radius: 6px;
            text-align: center;
            font-size: 12px;
            transition: all 0.3s ease;
        }

        .parameter-row input:focus {
            outline: none;
            border-color: #4299e1;
            box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
        }

        .parameter-row .value-display {
            width: 40px;
            text-align: right;
            font-weight: 600;
            color: #4299e1;
            font-size: 12px;
        }

        .control-buttons {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 15px;
        }

        .control-btn {
            width: 100%;
            padding: 10px 15px;
            border: none;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 600;
            color: white;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .control-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .control-btn:active {
            transform: translateY(0);
        }

        .btn-start { background: linear-gradient(135deg, #48bb78 0%, #38a169 100%); }
        .btn-stop { background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%); }
        .btn-sync { background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%); }
        .btn-packet { background: linear-gradient(135deg, #ed8936 0%, #dd6b20 100%); }
        .btn-clear { background: linear-gradient(135deg, #a0aec0 0%, #718096 100%); }

        .clocks-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            background: white;
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            flex: 0 0 auto;
        }

        .clock {
            padding: 15px;
            border-radius: 12px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .clock::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
            backdrop-filter: blur(10px);
            z-index: 1;
        }

        .clock > * {
            position: relative;
            z-index: 2;
        }

        .server-clock {
            background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
            color: white;
        }

        .client-clock {
            background: linear-gradient(135deg, #805ad5 0%, #6b46c1 100%);
            color: white;
        }

        .clock h3 {
            font-size: 1em;
            margin-bottom: 8px;
            font-weight: 600;
            opacity: 0.9;
        }

        .clock .time {
            font-size: 1.8em;
            font-weight: 700;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .clock .info {
            font-size: 0.8em;
            opacity: 0.8;
            line-height: 1.4;
        }

        .network-visualization {
            background: white;
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
            overflow: hidden;
            flex: 0 0 auto;
            height: 120px;
        }

        .network-node {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            color: white;
            position: relative;
            z-index: 3;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            transition: all 0.3s ease;
            font-size: 11px;
        }

        .network-node:hover {
            transform: scale(1.05);
        }

        .server-node {
            background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
        }

        .client-node {
            background: linear-gradient(135deg, #805ad5 0%, #6b46c1 100%);
        }

        .network-path {
            position: absolute;
            top: 50%;
            left: 80px;
            right: 80px;
            height: 6px;
            background: linear-gradient(90deg, #4299e1, #48bb78, #4299e1);
            border-radius: 3px;
            transform: translateY(-50%);
            box-shadow: 0 2px 10px rgba(66, 153, 225, 0.3);
        }

        .packet {
            position: absolute;
            width: 16px;
            height: 16px;
            background: #f6ad55;
            border-radius: 50%;
            top: 50%;
            transform: translateY(-50%);
            z-index: 4;
            box-shadow: 0 4px 15px rgba(246, 173, 85, 0.5);
            display: none;
        }

        @keyframes packetMove {
            0% { left: 80px; opacity: 0; transform: translateY(-50%) scale(0.5); }
            10% { opacity: 1; transform: translateY(-50%) scale(1); }
            50% { left: 50%; transform: translateY(-50%) scale(1.2); box-shadow: 0 4px 20px rgba(246, 173, 85, 0.8); }
            90% { opacity: 1; transform: translateY(-50%) scale(1); }
            100% { right: 80px; left: auto; opacity: 0; transform: translateY(-50%) scale(0.5); }
        }

        .packet.reverse {
            animation: packetMoveReverse 1s ease-in-out;
        }

        @keyframes packetMoveReverse {
            0% { right: 80px; left: auto; opacity: 0; transform: translateY(-50%) scale(0.5); }
            10% { opacity: 1; transform: translateY(-50%) scale(1); }
            50% { right: 50%; transform: translateY(-50%) scale(1.2); box-shadow: 0 4px 20px rgba(246, 173, 85, 0.8); }
            90% { opacity: 1; transform: translateY(-50%) scale(1); }
            100% { left: 80px; right: auto; opacity: 0; transform: translateY(-50%) scale(0.5); }
        }

        .chart-container {
            background: white;
            border-radius: 15px;
            padding: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            position: relative;
            flex: 1;
            min-height: 0;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .chart-container::-webkit-scrollbar {
            width: 6px;
        }

        .chart-container::-webkit-scrollbar-track {
            background: #f1f5f9;
            border-radius: 3px;
        }

        .chart-container::-webkit-scrollbar-thumb {
            background: #4299e1;
            border-radius: 3px;
        }

        .chart {
            width: 100%;
            flex: 1;
            border-radius: 10px;
            background: #f8fafc;
            border: 1px solid #e2e8f0;
        }

        .chart-title {
            position: absolute;
            top: 8px;
            left: 15px;
            font-weight: 600;
            color: #2d3748;
            font-size: 1em;
        }

        .status-section {
            background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
            border-radius: 12px;
            padding: 15px;
            border: 1px solid #e2e8f0;
        }

        .status-section h4 {
            color: #2d3748;
            margin-bottom: 12px;
            font-size: 1em;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .status-section h4::before {
            content: '📊';
            font-size: 1.1em;
        }

        .status-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
            padding: 8px 12px;
            background: white;
            border-radius: 8px;
            border: 1px solid #e2e8f0;
        }

        .status-item .label {
            font-size: 0.8em;
            color: #718096;
            font-weight: 500;
        }

        .status-item .value {
            font-weight: 700;
            color: #2d3748;
            font-size: 0.85em;
        }

        .status-item.active .value {
            color: #4299e1;
        }

        .metrics-section {
            background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
            border-radius: 12px;
            padding: 15px;
            border: 1px solid #e2e8f0;
        }

        .metrics-section h4 {
            color: #2d3748;
            margin-bottom: 12px;
            font-size: 1em;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .metrics-section h4::before {
            content: '📈';
            font-size: 1.1em;
        }

        .metric-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
            padding: 8px 12px;
            background: white;
            border-radius: 8px;
            border: 1px solid #e2e8f0;
        }

        .metric-item .label {
            font-size: 0.8em;
            color: #718096;
            font-weight: 500;
        }

        .metric-item .value {
            font-weight: 700;
            color: #4299e1;
            font-size: 0.85em;
        }

        .log-section {
            background: rgba(45, 55, 72, 0.95);
            border-radius: 12px;
            padding: 15px;
            color: white;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            font-size: 11px;
            overflow-y: auto;
            height: 400px;
        }

        .log-section::-webkit-scrollbar {
            width: 6px;
        }

        .log-section::-webkit-scrollbar-track {
            background: rgba(255,255,255,0.1);
            border-radius: 3px;
        }

        .log-section::-webkit-scrollbar-thumb {
            background: rgba(255,255,255,0.3);
            border-radius: 3px;
        }

        .log-entry {
            margin-bottom: 4px;
            padding: 4px 8px;
            border-radius: 4px;
            line-height: 1.3;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .log-info { background: rgba(66, 153, 225, 0.2); }
        .log-success { background: rgba(72, 187, 120, 0.2); }
        .log-warning { background: rgba(237, 137, 54, 0.2); }
        .log-error { background: rgba(245, 101, 101, 0.2); }

        @media (max-width: 1200px) {
            .app-container {
                grid-template-columns: 1fr;
                grid-template-rows: 80px 1fr auto auto;
                height: 100vh;
                gap: 10px;
                padding: 10px;
            }
            
            .controls-panel {
                height: 300px;
                order: 2;
            }
            
            .experiment-area {
                order: 1;
                min-height: 400px;
            }
            
            .observations-panel {
                height: 250px;
                order: 3;
            }
            
            .clocks-container {
                grid-template-columns: 1fr;
                gap: 10px;
                padding: 15px;
            }
            
            .network-visualization {
                height: 100px;
                padding: 15px;
            }
            
            .network-node {
                width: 60px;
                height: 60px;
                font-size: 10px;
            }
            
            .chart-container {
                padding: 12px;
            }
        }
        
        @media (max-width: 768px) {
            .header h1 {
                font-size: 1.5em;
            }
            
            .parameter-group {
                padding: 12px;
            }
            
            .parameter-row {
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }
            
            .parameter-row label {
                text-align: left;
                margin-bottom: 3px;
            }
            
            .parameter-row input {
                width: 100%;
                max-width: 100px;
                align-self: flex-start;
            }
            
            .control-btn {
                padding: 8px 12px;
                font-size: 12px;
            }
            
            .clock .time {
                font-size: 1.4em;
            }
            
            .network-visualization {
                flex-direction: column;
                gap: 15px;
                height: auto;
                padding: 15px;
            }
            
            .network-path {
                display: none;
            }
            
            .packet {
                display: none !important;
            }
            
            .status-item, .metric-item {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
                gap: 4px;
            }
            
            .log-section {
                max-height: 200px;
            }
        }
        
        /* Mobile Landscape Support - Desktop-like Experience */
        @media screen and (max-width: 968px) and (orientation: landscape) {
            .app-container {
                grid-template-columns: 280px 1fr 300px;
                grid-template-rows: 60px 1fr;
                gap: 10px;
                padding: 10px;
            }
            
            .header {
                padding: 0 15px;
            }
            
            .header h1 {
                font-size: 1.4em;
            }
            
            .controls-panel {
                padding: 15px;
                height: calc(100vh - 80px);
            }
            
            .observations-panel {
                padding: 15px;
                height: calc(100vh - 80px);
            }
            
            .parameter-group {
                padding: 12px;
                margin-bottom: 12px;
            }
            
            .parameter-group h4 {
                font-size: 0.9em;
                margin-bottom: 10px;
            }
            
            .parameter-row {
                margin-bottom: 8px;
            }
            
            .parameter-row label {
                font-size: 0.75em;
            }
            
            .parameter-row input {
                width: 55px;
                padding: 5px 6px;
                font-size: 0.75em;
            }
            
            .parameter-row .value-display {
                width: 35px;
                font-size: 0.75em;
            }
            
            .control-btn {
                padding: 8px 12px;
                font-size: 0.8rem;
                margin-bottom: 6px;
            }
            
            .scenario-section {
                padding: 15px;
            }
            
            .scenario-section h3 {
                font-size: 1em;
                margin-bottom: 12px;
            }
            
            .scenario-select {
                padding: 10px 12px;
                font-size: 0.8rem;
            }
            
            .clocks-container {
                padding: 15px;
                gap: 12px;
            }
            
            .clock {
                padding: 12px;
            }
            
            .clock h3 {
                font-size: 0.9em;
                margin-bottom: 6px;
            }
            
            .clock .time {
                font-size: 1.4em;
                margin-bottom: 8px;
            }
            
            .clock .info {
                font-size: 0.75em;
            }
            
            .network-visualization {
                padding: 15px;
                height: 100px;
            }
            
            .network-node {
                width: 70px;
                height: 70px;
                font-size: 10px;
            }
            
            .chart-container {
                padding: 12px;
            }
            
            .chart-title {
                font-size: 1em;
                margin-bottom: 10px;
            }
            
            .status-section {
                padding: 12px;
                margin-bottom: 12px;
            }
            
            .status-section h4 {
                font-size: 0.9em;
                margin-bottom: 10px;
            }
            
            .status-item,
            .metric-item {
                padding: 8px 10px;
                margin-bottom: 6px;
            }
            
            .status-item .label,
            .metric-item .label {
                font-size: 0.75em;
            }
            
            .status-item .value,
            .metric-item .value {
                font-size: 0.8em;
            }
            
            .log-section {
                height: 250px;
                font-size: 0.75rem;
                padding: 12px;
            }
            
            .log-entry {
                padding: 5px 8px;
                margin: 3px 0;
                font-size: 0.75rem;
            }
            
            /* Ensure experiment area uses full space */
            .experiment-area {
                min-height: calc(100vh - 80px);
            }
        }
        
        /* Tablet Landscape - Slightly different layout */
        @media screen and (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
            .app-container {
                grid-template-columns: 300px 1fr 320px;
                grid-template-rows: 70px 1fr;
                gap: 12px;
                padding: 12px;
            }
            
            .header h1 {
                font-size: 1.6em;
            }
            
            .controls-panel,
            .observations-panel {
                height: calc(100vh - 90px);
            }
        }
        
        /* Mobile Portrait Orientation Overlay */
        .rotate-device-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            z-index: 10000;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: white;
            text-align: center;
            padding: 20px;
        }

        .rotate-device-overlay .rotate-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            animation: rotateAnimation 2s ease-in-out infinite;
        }

        .rotate-device-overlay h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .rotate-device-overlay p {
            font-size: 1rem;
            opacity: 0.9;
            line-height: 1.5;
            max-width: 300px;
        }

        @keyframes rotateAnimation {
            0%, 100% { transform: rotate(0deg); }
            25% { transform: rotate(-15deg); }
            75% { transform: rotate(15deg); }
        }

        @media screen and (max-width: 768px) and (orientation: portrait) {
            .rotate-device-overlay {
                display: flex !important;
            }
            
            .app-container {
                display: none !important;
            }
        }

        /* Info Modal Styles */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 1000;
            justify-content: center;
            align-items: center;
            padding: 20px;
            box-sizing: border-box;
        }

        .modal-content {
            background: white;
            border-radius: 20px;
            width: 100%;
            max-width: 900px;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
            animation: modalSlideIn 0.3s ease-out;
        }

        @keyframes modalSlideIn {
            from {
                opacity: 0;
                transform: translateY(-50px) scale(0.9);
            }
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }

        .modal-header {
            padding: 25px 30px 15px;
            border-bottom: 2px solid #e2e8f0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
            color: white;
            border-radius: 20px 20px 0 0;
        }

        .modal-header h2 {
            margin: 0;
            font-size: 1.8em;
            font-weight: 700;
        }

        .modal-close {
            background: none;
            border: none;
            font-size: 2em;
            color: white;
            cursor: pointer;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .modal-close:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: scale(1.1);
        }

        .modal-body {
            padding: 30px;
            color: #2d3748;
            line-height: 1.6;
            font-size: 14px;
        }

        .guide-section {
            margin-bottom: 25px;
            background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
            border-radius: 12px;
            padding: 20px;
            border-left: 4px solid #4299e1;
        }

        .guide-section h3 {
            color: #2d3748;
            margin: 0 0 15px 0;
            font-size: 1.2em;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .guide-section p {
            margin: 0 0 12px 0;
            color: #4a5568;
        }

        .guide-section ul, .guide-section ol {
            margin: 12px 0;
            padding-left: 20px;
        }

        .guide-section li {
            margin: 8px 0;
            color: #4a5568;
        }

        .formula-box {
            background: #2d3748;
            color: white;
            padding: 15px;
            border-radius: 8px;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            margin: 15px 0;
            text-align: center;
            font-size: 13px;
            line-height: 1.8;
        }

        .modal-content::-webkit-scrollbar {
            width: 8px;
        }

        .modal-content::-webkit-scrollbar-track {
            background: #f1f5f9;
            border-radius: 4px;
        }

        .modal-content::-webkit-scrollbar-thumb {
            background: #4299e1;
            border-radius: 4px;
        }

        .modal-content::-webkit-scrollbar-thumb:hover {
            background: #3182ce;
        }

        @media (max-width: 768px) {
            .modal-content {
                margin: 10px;
                max-height: 95vh;
            }
            
            .modal-header {
                padding: 20px 20px 10px;
            }
            
            .modal-header h2 {
                font-size: 1.4em;
            }
            
            .modal-body {
                padding: 20px;
                font-size: 13px;
            }
            
            .guide-section {
                padding: 15px;
                margin-bottom: 20px;
            }
            
            .guide-section h3 {
                font-size: 1.1em;
            }
        }